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Finding the Fourth Proportional to 302.52, 456.24 and 278.76

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Solution

The fourth proportional to 302.52, 456.24 and 278.76 is: 420.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    302.52 : 456.24 = 278.76 : x
  2. Step 2: Convert to fraction form
    302.52/456.24 = 278.76/x
  3. Step 3: Cross multiply
    302.52x = 456.24 × 278.76
  4. Step 4: Simplify right side
    302.52x = 127,181.46
  5. Step 5: Solve for x
    x = 127,181.46/302.52
  6. Step 6: Final answer
    x = 420.41

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.